Improvement in signal whistles



. representsr the-guides or guideways,

cinitier grafts iger-trutY ffice.

PAUL S. BURDITT AND OTHIEL PRESTN, 0F HASKINSVILLE, NEW YORK.

Letters Patent' llo. 64,483, dated May 7, 1867. I i

IMPROVEMENT IN SIGNAL WHISTLES.

T0' ALL WHOM IT MAY CONCERN: A

Be it known that we, OTHNIEL' PnE's'roN and Pain. S. Bunnrr'r, of .Haskinsville,'State of NewYork, have invented certain newand useful improi'ements in Signal Whistles; and wedeclare the following to be a. full, true, and exact description of the same, reference being had to the accompanying drawings, and to theletters of reference marked thereon.

Figure 1 represents a plan View of our whistle. l' 5e" Figure 2 representenI plan view of the disk by means of which the sound 'is produced; and

Figure S'represents asecton View of the cylinder showing the Whistle. y

Letter A represents the frame of our whistle, whichis-of an oblong shape, and may bey constructed of either wood or iron. Letter B represents brace's o'r cross-ties, which hold the framej-together and give it greater strength andstability. Letter-G represent-s .a cylinder in which the air is compressed for the purpose of pro d'ucing thehwhstle or sound, andA rests uponthe two braces B B. Letter D represents the piston-rod, by .which the piston in the cylinder C is worked backward and forward for the purpose vof compressing the air and forcing' it through the. aperture in the disk dil, as shown in iig. 2. Letter F repgesents'the disk by which the sound is produced, and is placed in the= head` of the cylinder. This disk is perforated in two places: No. 1 is placed in the centre of the disk through which the air is forced by the piston; No. 2 is placed more to uone side, and is prorided'with a leather cov'erfFThe side'of the plate or disk thet is provided with a leather cover-is placed inside of the cylinder, so that when the air is compressed by the piston the cover is forced 'tightly against the plate so as to make the air esce-pe through' the middle aperture. When the piston 1s drawn back, the air, in

- rushing in to fill the vacuum, forces the cover baclgsoasto allow it to pass through both apertures. Letter F which are attached'to the side of the frame A, and are provided for .the slideG to work upon, and are so attached to the frame as to extend the edges. Letter G represents a sliding plete, which consists of two pieces. The one works above andthe other below the guides F F. This slide is attached to the rear end of the piston-rod D, and inoves it vbach and forward by means of the spring H and cord L The spring H is attached to the under side of the freine, passes over the roller J, and is attached to the slide (Si.- This spring may either be of--rubber or coiled wire, and is used for the purpose. of drawing the slide Gba-ck to its position after it has beenpdrawn forward by the cord for the purpose of compressing the air by means of .the piston in the cylinder C. .The cord I is attached .to the slide G, passes over the-pulleywheel at the point K, and is again attachedto the hook on the slide G. i y When it is necessary to sond the whistle, a' person has but to pull the into the cylinder, whereby the air is compressed, and inescaping through the The advantages of our whistle consist in its simplicity of construction, and the ease een he produced. A l

Having thus described our invention, what we claini, and desire'to-secure by Letters Patent, s

cord I, which forces the .piston-rod disk the 'desired sound is produced. by which the sound 1. The valve E, cylinder C, piston-rod D, and cord I, all combiried and operated as and for the purpose i set forth.

2. The sliding plate G, spring H, roller J, and specied. v n f i PAUL S. BURDITT,

'OTHNIEL PRESTON.

pulley K, all combined and operated as and for the purpose i Witnesses:

H. HLLIDAY,

CEAS. MARKHAM. 

